quick frontend (chat): added encrypted property

sat_frontends/quick_frontend/quick_chat.py

@@ -150,6 +150,10 @@ class Message:
         ret = self.host.getAvatar(self.from_jid, profile=self.profile)
         return ret
 
+    @property
+    def encrypted(self):
+        return self.extra.get("encrypted", False)
+
     def getNick(self, entity):
         """Return nick of an entity when possible"""
         contact_list = self.host.contact_lists[self.profile]